Region code validation

[Ariana-B]

In the event that there is an error with the upstream data, resulting in issues like the ones mentioned here, eo-datasets could potentially verify that a dataset's polygon intersects with the polygon of its region code.

[Ariana-B]

@uchchwhash @dunkgray thoughts?

[dunkgray]

@jeremyh is looking into this issue overall. Let's see what he comes back with.